f. Release pressure and verify that the display reads 0, if
not: power off and repeat from step 2.
g. Check the calibration and linearity by applying pressure of
330 mmHg (440 mBar) and 165 mmHg (220 mBar), and
verify that the QA-1290 displays this value ± 1mmHg.
Pressure sensor
Reference
Measured value
0 mBar (0 mmHg)
220 mBar (165 mmHg)
440 mBar (330 mmHg)
660 mBar (495 mmHg)
*Tolerance Pressure Sensor: ± 1 mmHg
5. The calibration procedure is now complete.
7-2
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